Cup blank



H. cARLE cupl BLANK Fuad June '7, 19%

Pesma May 2,1; 1929.

PA'rsN-T ljoin-ica.

umom) cAnLE, or nUFFALo', NEW Yonx, Assiowon, BY 'masna' nssxenxam's; `'ro' von'rnx mre. co., or CHICAGO, ILLINoIs, A conromrron on :La-mora i CUP BLANK.

Application flle June 7,

An object of this invention is to providean improved blank which may be formed into a conical vessel for drinking or similar purposes, which may be easily fabricated into a cup and which will produce a strong tight cupl with aminimum consumption of paper.

Another object of 'the invention is to provide an improved blank from Which a cup may be formed completely and tightly closed at the .a-pex, withouta tab.

` Other objects of the invention will in part be obvious and 'will in part appear' hereinafter.

On the drawings:

Figure 1 is a developed-plan vievs7 of a cup blank embodying the principles' of this invention. i i i Figure 2 is a front 'view' of a formed cup. It has heretofore been proposed to construct paper drinking Ivessels of general segmental shaped sheets having a projection at the apex of the segment which may be folded around the apex of the cup when formed to.

close the apex. Such cupsare objectionable by reason of the fact that difliculty is experienced in maintaining a Water-tight joint at the apex of the cup, and the projecting tab at. the apex of the blank prevents the economical cutting of the blank from the paper sheet. i

It has also ,been proposed' to construct paper drinking cu s having the center of the arc wholly wit in a sheet of paper in order to make a water-tight joint at the apex of the cup, as shown for example in the patent to Sharon, No. 1,134,916, but such cups havenot been commercially successful because amongv Otherdifiiculties the excess of paper produces an undue thickness particularly at the apex and the blank is undu'ly wasteful of papercin the cutting. Furthermore with such construction, the center has been spaced so far from the edge that when the-blankwas folded in conical shape, the free edge of the blank could not be adhesively secured to the opposed side of the blank, but instead was folded back upon itself so that a folded edge was juxtaposed to the opposed side. Such a folded edge in cups of this character does not satisfactorily adhere.

In acoordance with the present invention, it is possible to construct a blank which will 1924; Vsemi m. maza.

be tightlyjclosed at the apex without a tab' and which will be simple to. construct and economical in manufacture. o

The blank 1 is of general4 segmental shape having an arcuate side 2 struck from a center 3. One of the remaining sides as 4 may be substantially radial, passing,V however, outside of and slightly s aced from the center 3. The other side o the blank 5 is materially spaced from the radius 6 and 'may be substantially paralle to it. The sides 4 and 5 continue until they substantially meet each otheras at 7 although it will be obvious that the blank ma be rounded at the intersection"7 if desire Y In the manufacturing ofv a conieal cup from this blank, the apex of the cone will be placed' substantially at the center 3 so that it is completely within the area of the blank. Thus there' is no opening at the apex to be closed. At the same time by reason of vthe proximity of vthecenter 3 to the side 4, the blank may be formed directly into a cone With' the edge 4 flat against the opposed side of the blank as at 6 without tearing of the paper at the apex. A very short crimped or kinked'extension, or tip, limited in length by the distancebetween 'the center 3 and the edge 4, is formed; and this extension is bent or folded about the apex of the cone and is over'lapped by the portion of the blank shown on the left of the radius 6 in Figure 1 of the drawings when this overlapping lse sio

portion of the blank is wrapped about the cone externally of the ed e 4.

The blank is folded to t e point `where the side 4 slightly over-laps the opposite side 5 as at 8 so that the material between the line 8 and the-edge 5 serves as an over-lap which may be tight, an by reason of the smaller diameter of the apex of the cup, this projecting portion will lap far around the cup at the apex so that the cup is materially strengthene and'secured thereby. 4

That portion 9 of the line 4 which is beyond the center when the blank is constructed proportionately as shown, will lie upon asted around the cup to hold it` lot the cup along one of the elements of the cone,` i'

thereb'y improving the appearance of the glaving described my invention, what I claim as new and desire to secure by Letters Patent, is

1. A blank forming a drinking cup comprising a sheet bounded by an \arcuate ed e,

and two non-radial ed es of different lengt s including the center othe arc between them, the longer ofl said non-radial edges meeting the shorter non-radial edge at a point beyond the center ofthe arc to form a relatively wide' overlap portion, the said longer non-radial edge being so close to the center of the arc that when the major portion of said longer non-radial ed e is revolved about said center as the apex o a cone to coincide With a radiusla short crimped extension is formed said'extension being adapted to fold about the ape'x and to underlie said overlap portion when said overlap portion is brought into its final position exterfially of said longer non-radial edge.

2. A blank for forming a drinking cup comprising a sheet bounded 'by an arcuate edge, and two substantially straight nonradial edges of different lengths including the center of the arc between them, the longer ofv said straight edges meeting the shorter straight edge at a point beyond the center of the arc -to form a relatively wide overlap portion, the said longer straight edge being so close to the center of the arc that When the major portion of said longer straight edge is revolved about said center as the apex-of a cone to coincide With a radius a short extension isA formed, said extension being adapted to fold about the apex and to 'underlie said overlap portion when said overlap portion is brought into its final position 'externally of said "longer straight edge.

In testimony whereof I aflix my sivnature.

HARoLD cAiaLE.. 

